【名词&注释】
肺结核(pulmonary tuberculosis)、压缩空气(compressed air)、电火花(electric spark)、恢复时间(recovery time)、脉冲宽度(pulse width)、凿岩机(rock drill)、风动工具(pneumatic tool)、转氨酶升高(transaminase elevation)、近场区(near field region)、无症状(asymptomatic)
[单选题]肺结核患者服结核药物期间发生无症状(asymptomatic)的轻度转氨酶升高(transaminase elevation)的比率大致为()
A. 5%
B. 8%
C. 10%
D. 15%
E. 20%